The 25.6-km-long Janakpuri West - Kalkaji Mandir stretch of the Delhi Metro's Magenta Line was formally inaugurated here on Monday, marking the complete operationalisation of the line, a part of which was inaugurated in December last year. Union Minister for Housing and Urban Affairs (Independent Charge) Hardeep Singh Puri and Delhi Chief Minister Arvind Kejriwal flagged off the stretch by waving the green flag from the Janakpuri West Metro station.